# ECHO On vs Echo Calculate

The clearest difference is in-app purchases: ECHO On at none against Echo Calculate's 1. ECHO On also leads on update cadence (weekly vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Echo Calculate sells 1 one-off in-app purchase. ECHO On asks for nothing beyond the download.

ECHO On ships an update weekly, Echo Calculate every 6 months. The most recent releases landed on September 10, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | ECHO On | Echo Calculate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (14 ratings)](https://appshunter.io/ios/app/echo-on/id1519707786/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 months |
| Monetization | Free | — |
| Size | 414 MB | 26 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Robert Arrigo](https://appshunter.io/developer/1519707788) | [Gundogan Emre](https://appshunter.io/developer/1651146056) |

## What reviewers say

### ECHO On

[App page](https://appshunter.io/ios/app/echo-on/id1519707786)

This medical education app helps users learn Transesophageal Echocardiography with a question bank, cognitive aid, case log, and reference library. It provides guidance on performing and interpreting a standard 28-view exam, including anatomy, function, and Doppler interrogations.

**Highlights:** Transesophageal Echocardiography education, Enlarging question bank, Rescue TEE cognitive aid, Case Log system, Perioperative Quick Reference library, Offline echo loops, Pathology, technique, and normal loop examples

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Echo Calculate

[App page](https://appshunter.io/ios/app/echo-calculate/id1660468437)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo Calculate Premium | $3.99 | one-time |


## Frequently asked questions

### Is ECHO On free?

ECHO On is free to download, with no in-app purchases.

### Is Echo Calculate free?

Echo Calculate is free to download, with in-app purchases available.

### Do ECHO On or Echo Calculate have ads?

Neither ECHO On nor Echo Calculate shows ads.

### Which is updated more often, ECHO On or Echo Calculate?

ECHO On ships an update weekly, and Echo Calculate every 6 months. Most recently, ECHO On was updated on September 10, 2026 and Echo Calculate on September 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*